import router from './router'
import { ElMessage } from 'element-plus'
import NProgress from 'nprogress'
import 'nprogress/nprogress.css'
import { getToken } from '@/utils/auth'
import { isHttp, isPathMatch } from '@/utils/validate'
import { isRelogin } from '@/utils/request'
import useUserStore from '@/store/modules/user'
import useSettingsStore from '@/store/modules/settings'
import usePermissionStore from '@/store/modules/permission'

NProgress.configure({ showSpinner: false })

const whiteList = ['/login', '/register']

const isWhiteList = path => {
  return whiteList.some(pattern => isPathMatch(pattern, path))
}

// 查找第一个可访问的路由
const findFirstAccessibleRoute = routes => {
  for (const route of routes) {
    // 跳过隐藏的路由和重定向路由
    if (route.hidden || route.redirect !== 'noRedirect') {
      continue
    }
    // 如果有子路由，递归查找
    if (route.children && route.children.length > 0) {
      for (const child of route.children) {
        if (!child.hidden && !child.redirect) {
          // 构建完整路径
          const fullPath = route.path === '/' ? child.path : `${route.path}/${child.path}`.replace('//', '/')
          return fullPath
        }
      }
    } else {
      // 没有子路由，直接返回路径
      return route.path
    }
  }
  return null
}

router.beforeEach((to, from, next) => {
  NProgress.start()
  if (getToken()) {
    to.meta.title && useSettingsStore().setTitle(to.meta.title)
    /* has token*/
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done()
    } else if (isWhiteList(to.path)) {
      next()
    } else {
      if (useUserStore().roles.length === 0) {
        isRelogin.show = true
        // 判断当前用户是否已拉取完user_info信息
        useUserStore()
          .getInfo()
          .then(() => {
            isRelogin.show = false
            usePermissionStore()
              .generateRoutes()
              .then(accessRoutes => {
                // 根据roles权限生成可访问的路由表
                accessRoutes.forEach(route => {
                  if (!isHttp(route.path)) {
                    router.addRoute(route) // 动态添加可访问路由表
                  }
                })

                // 智能首页重定向逻辑
                if (to.path === '/' || to.path === '/index') {
                  // 检查是否有首页权限或首页路由是否存在
                  const hasIndexRoute = router.hasRoute('Index')
                  const canAccessIndex =
                    hasIndexRoute &&
                    (!to.meta?.permissions ||
                      usePermissionStore().permissions.some(perm => to.meta.permissions.includes(perm)))
                  if (!hasIndexRoute || !canAccessIndex) {
                    // 如果没有首页权限，重定向到第一个可访问的路由
                    const firstAccessibleRoute = findFirstAccessibleRoute(accessRoutes)
                    if (firstAccessibleRoute) {
                      next({ path: firstAccessibleRoute, replace: true })
                      return
                    }
                  }
                }

                next({ ...to, replace: true }) // hack方法 确保addRoutes已完成
              })
          })
          .catch(err => {
            useUserStore()
              .logOut()
              .then(() => {
                ElMessage.error(err)
                next({ path: '/' })
              })
          })
      } else {
        next()
      }
    }
  } else {
    // 没有token
    if (isWhiteList(to.path)) {
      // 在免登录白名单，直接进入
      next()
    } else {
      next(`/login?redirect=${to.fullPath}`) // 否则全部重定向到登录页
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  NProgress.done()
})
